Transmission mechanism.



H. DEVLIN. TRANSMISSION MBGHNISM.l v APPLICATION FILED P212, 1912.

1,079,477, 'Patented Nov.25,1'913.

2 SHEETS-SHEET 2.

imirED STATES PATENT oEEIoE.

HENRY DEVLIN, OF BAY CITY, MICHIGAN, ASSIGNOR 'IOTI-IE IVI.V GARLAND COMPANY, OF BAY CITY, MICHIGAN, A CORPORATION OF MICHIGAN.

' TRANSMISSION MECHANISM.

transmission mechanism for driving a shaft from any source of power at the rate Vof speed desired together with means for reversing the direction of drive, the mechae nism being arranged to be carried by the shaft, the parts being so disposed asto be easy of access for inspection or repair. p

In general terms, thev mechanism consists of an external rotatable casing adapted to be driven from any source of power and journaled on the shaft to be operated, togethery with change speed members housedV inandl carried by the casing and a reverse clutch also within vthe casing.

The invention consists in the matters here-I inafter set forth, and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a view in section of a mechanismembodying the invention mounted on a shaft; Fig. 2 is a view in side elevation of the mechanism with a plate" removed.

Referring to the drawings a shaft 1 is mounted in a pair of suitably disposed lixed bearings 2 and 3 whose end portions are arranged to interlock with the hubs 4 and'5 of sprocket wheels rotatable and longitudinally reciprocable on the shaft. AA main driving member in the form of a cylindrical casing 6 is journaled concentrically onl the outer portions of the hubs 4 and 5, between a thrust collar 7 y secured on the latter hub y and a shifting collar 8 on thehub 4.4 The periphery of the casing is adapted to receive a belt or may be driven by friction or may have gear or sprocket chain teeth as desired. Y

A friction drum 9 is secured on the shaft 1 between the hubs 4 and 5 and has afdouble cone driving rim 10 whose oppositely inclined faces are adapted to contact respectively, with the interior peripheral faces of Specication of Letters Patent.V i Application filed. February 2, 1912.

reference being had therein toV movement carries th y dicated as aA are mounted may be shifted in the ,PatentedNom 25, 1913. Serial No. 674.7877.

friction spiders 11 and-12'formed on or made fast to the hubs 4 and 5. Thrust shoulders 134 and 14 on lthe hubs engage the bearing bosses 15 and 16 of the casing so that the movement of the `collar 8 toward the friction drum 9 forces the spider 11 into engagement with the rim 10 and a reverse e shell y12 into similar drivingy relation to the rim.

The pinion 4 has two parts or members. One member 17 of the sprocket wheel 4 is Valin'ed with the member 18 -of a planetary pinion 19'that likewise has two parts lor members turning on a stud 20 in the casing 6. An endless flexible connection, herein insprocket 21, operatively connects the members 17 and 18. A second member ,-22 of the sprocket wheel 4 is likewise alined with and operatively connected to a member 25 of a planetary pinion 26 mounted on afstud 27 in the casing diametrically opposite the stud 20. A second member 29 of theplanetary pinion 19is coupled 'as by a `suitable flexible connection30 with a member31'of the sprocket wheel 5 and a member 32' ofthe planetaryv pinion 26 is likewise operatively coupled byaconnection 33 with the other member 34 of the sprocket wheel 5. Idlers 35 are Vjournaled in the casing in'proper position to 'take-up the slack of theseveral endless con-nections and may be provided with any suitable adjusting means whereby the studs 36 on which they casing to compensate for wear.

`Ashifting rod 37 has a forked end embracing the collar 8 and swinging on a pivot Yplate 38, pins 39 on the lever entering a peripheral groove in the shifting collar.

'y The parts' are so disposed that movement of theV lever in one direction as for example, as shown by thev arrow, locksf the sprocket wheel 4 withv the bearing 2 and simultane-` ously therewith carries the sprocket wheel 5 out of connection with the companion bearing 3. This movement also releases the spider 11 from the drum`9 and throws theV lat-ter into engagement with the vshell 12 on the sprocket wheel 5. When the casing is rotated while the parts are in this position, the revolution of the planet-ary pinions 18 and 25 around the `shaft l drives the planetary pinions in reverse direction to the rotation of the casing and this -in turn rotates the sprocket Wheel 5 togetl'ier with the clutch' 9 andthe shaft; The rate of rotation of the shaft as compared with the casing depends upon the proportionate diameters of the several pinions. Reversal of position of the lever locks the sprocket wheel 5 from rotation and thrusts the sprocket wheel t into engagement with' the clutch to turn the shaft,` therebydriving the latter reversely. Or by proper proportioning of thegears this Vmovement of the lever may cause merely a change in the rate ,of rotation of the shafts as compared with the casing. The mechanism 'thus` effects both reduction Vof speed andv reversal of direction of the shaft and although it is mounted thereon it is easily accessible for inspection and repair.

The sprocket chains hereinI illustrated and described may obviously be replaced by belts or gears. One of theplanetary pinions may vbe Aomitted or additional members may be placed on theV sprocket Wheels and the number ,of vplanetary sprocket wheels correspond- VVingly increased in order to obtain the desired transmission capacity. v V Y .Other changesmay be lmade without de partingv from the scope of the invention and Y1 .do not care-to limit myself to any particu- Vlarform or arrangement of parts. Il I claiml. Transmission mechanism comprising a shaft, a pair of sprocket wheels independently rotatable, and reciprocabl'e longitudinally on the shaft, a driving lmember rotatable concentrieally and' longitudinally reciproca-b'le with the sprocket wheels, means Y for ysecuring .one ofthe wheels from rotating when the'latter'are shifted in one direc- Y tion andthe other from rotating when shi-ft-Y ed in the opposite direction, means adapted to secure either wheel to the shaft when the companion wheel is secured from rotating,

planetary sprocket wheels on the driving -member provided with members each revoluble around a reciprecable sprocket wheel, andjendl'ess flexibler connections between said members j and companion freciprocable sprocketu wheels.

Y 2. Transmission mechanism eomprising'a sha-ft,;a pair of sprocket wheelsindependently rotatable andV reci-proca'blelongitudi- A ,1 nelly onrthe; shaft, :driving member rotatable concentrically and longitudinally reciprocable with, they sprocket wheels, means .for securing'onefof the wheels from rotat- V ing-when the latter are shifted in one directionand theother from rotating when they .are `shifted in the opposite direction, means Iadaptedto` secure either lwheel-to the shaft when thecompanionI wheel is secured from rotating, planetary sprocket Wheels on the -drivng `member provided with members each revoluble around a reciprocable sprocket wheel, endless flexible connections between 'the members of the planetary wheels and the companion sprocket wheels and means for shifting the reciprocable sprocket wheels and driving member on the shaft.

3. Transmission mechanism comprising a shaft, a friction drum secured thereto, a pair of sprocket wheels independently rotatable and reciprocable longitudinally on Vthe shaft on each side of the drum, a drivsprocket wheel, and means for shifting the reciprocable sprocket wheels and driving member.

4. Transmission mechanism, comprising a kshaft a pair of bearings, a friction drum secured to the shaft between the bearings, a sprocket wheel rotatable and reciprocable longitudinally of the shaft between each bearing and the drum, provided with a spider adapted to be moved by the shifting thereof into engagement with the drum and with a hub that is adapted to be interlocked `with the adjacent bearing when the said wheel is shifted away from the drum, a

driving member rotatable on the hubs concentrically with the reciprocable sprocket wheels which it connects to shift together, means for shifting the reciprocable wheels and driving member on the shaft, and planetary sprocket wheels on the driving member revoluble around the reciprocable wheels Vwith a member for the wheels, and endless -flexible connections between each member and companion reciprocable wheel.

5. Transmission mechanism comprising a Vshaft a pair of bearings therefor, a friction-drum secured to the shaft between the bearings, a sprocket wheel rotatable and longitudinally reciprocable on the shaft between each bearing and the drum provided `with aspider to be moved by the shifting *Y thereof into engagement with the drum an with a hub adapted to be interlocked with .the adjacent bearing when the Wheel is shifted away from the drum, each sprocket wheel having a pair of members, a driving vmember rotatable on the hubs concentri- [cally with the reciprocable Wheels which it connects to shift together, means for shiftetary wheels act as intermediate wheels being `the reeiprocable wheels, planetaryV tween the reciprocable wheels. 10 Wheels on the driving member revoluble iIn testimony whereof I affix my signature around the reciprocable wheels each havingv in presence of. two witnesses.

two members,v and endless iexible connec- Y HENRY DEVLIN. tions between the members on each planet- Witnesses:

ary wheel andthe companion vmembers of HAROLD GATES,

the reciprocable wheels whereby the plan- HARRISON W. GARLAND.

Copies of this patent may be obtained for ve ce'nts each, by addressing the Commissioner of Patents,

Washington, D. C. 

